./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/systemc/token_ring.11.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 79f20a4b12634e812af836a5fe92e9d987e7766e2c28337c49504608346f2347 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 14:53:27,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 14:53:27,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 14:53:27,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 14:53:27,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 14:53:27,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 14:53:27,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 14:53:27,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 14:53:27,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 14:53:27,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 14:53:27,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 14:53:27,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 14:53:27,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 14:53:27,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 14:53:27,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 14:53:27,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 14:53:27,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 14:53:27,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 14:53:27,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 14:53:27,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 14:53:27,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 14:53:27,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 14:53:27,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 14:53:27,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 14:53:27,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 14:53:27,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 14:53:27,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 14:53:27,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 14:53:27,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 14:53:27,495 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 14:53:27,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 14:53:27,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 14:53:27,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 14:53:27,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 14:53:27,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 14:53:27,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 14:53:27,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 14:53:27,499 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 14:53:27,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 14:53:27,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 14:53:27,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 14:53:27,501 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 14:53:27,529 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 14:53:27,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 14:53:27,529 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 14:53:27,529 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 14:53:27,530 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 14:53:27,530 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 14:53:27,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 14:53:27,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 14:53:27,531 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 14:53:27,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 14:53:27,532 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 14:53:27,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 14:53:27,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 14:53:27,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 14:53:27,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 14:53:27,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 14:53:27,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 14:53:27,533 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 14:53:27,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 14:53:27,533 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 14:53:27,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 14:53:27,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 14:53:27,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 14:53:27,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 14:53:27,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:53:27,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 14:53:27,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 14:53:27,534 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 14:53:27,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 14:53:27,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 14:53:27,535 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 14:53:27,535 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 14:53:27,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 14:53:27,535 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 14:53:27,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79f20a4b12634e812af836a5fe92e9d987e7766e2c28337c49504608346f2347 [2021-12-14 14:53:27,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 14:53:27,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 14:53:27,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 14:53:27,702 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 14:53:27,702 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 14:53:27,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.11.cil-1.c [2021-12-14 14:53:27,765 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82af4f0aa/9eeae5bde8a444da9e5c108696ab9ecf/FLAG7574665cc [2021-12-14 14:53:28,081 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 14:53:28,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.11.cil-1.c [2021-12-14 14:53:28,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82af4f0aa/9eeae5bde8a444da9e5c108696ab9ecf/FLAG7574665cc [2021-12-14 14:53:28,493 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82af4f0aa/9eeae5bde8a444da9e5c108696ab9ecf [2021-12-14 14:53:28,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 14:53:28,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 14:53:28,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 14:53:28,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 14:53:28,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 14:53:28,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:53:28" (1/1) ... [2021-12-14 14:53:28,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67a8d68f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:28, skipping insertion in model container [2021-12-14 14:53:28,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:53:28" (1/1) ... [2021-12-14 14:53:28,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 14:53:28,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 14:53:28,668 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.11.cil-1.c[671,684] [2021-12-14 14:53:28,733 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:53:28,739 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 14:53:28,747 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.11.cil-1.c[671,684] [2021-12-14 14:53:28,786 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:53:28,799 INFO L208 MainTranslator]: Completed translation [2021-12-14 14:53:28,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:28 WrapperNode [2021-12-14 14:53:28,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 14:53:28,800 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 14:53:28,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 14:53:28,801 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 14:53:28,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:28" (1/1) ... [2021-12-14 14:53:28,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:28" (1/1) ... [2021-12-14 14:53:28,851 INFO L137 Inliner]: procedures = 50, calls = 65, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 800 [2021-12-14 14:53:28,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 14:53:28,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 14:53:28,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 14:53:28,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 14:53:28,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:28" (1/1) ... [2021-12-14 14:53:28,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:28" (1/1) ... [2021-12-14 14:53:28,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:28" (1/1) ... [2021-12-14 14:53:28,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:28" (1/1) ... [2021-12-14 14:53:28,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:28" (1/1) ... [2021-12-14 14:53:28,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:28" (1/1) ... [2021-12-14 14:53:28,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:28" (1/1) ... [2021-12-14 14:53:28,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 14:53:28,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 14:53:28,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 14:53:28,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 14:53:28,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:28" (1/1) ... [2021-12-14 14:53:28,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:53:28,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:53:28,933 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 14:53:28,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 14:53:28,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 14:53:28,964 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-14 14:53:28,964 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-14 14:53:28,965 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 14:53:28,965 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 14:53:28,965 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-14 14:53:28,965 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-14 14:53:28,965 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-14 14:53:28,965 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-14 14:53:28,965 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-14 14:53:28,965 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-14 14:53:28,966 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-14 14:53:28,966 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-14 14:53:28,966 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-14 14:53:28,966 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-14 14:53:28,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 14:53:28,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 14:53:28,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 14:53:29,043 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 14:53:29,045 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 14:53:29,505 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 14:53:29,513 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 14:53:29,513 INFO L301 CfgBuilder]: Removed 14 assume(true) statements. [2021-12-14 14:53:29,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:53:29 BoogieIcfgContainer [2021-12-14 14:53:29,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 14:53:29,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 14:53:29,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 14:53:29,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 14:53:29,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:53:28" (1/3) ... [2021-12-14 14:53:29,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@686a7182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:53:29, skipping insertion in model container [2021-12-14 14:53:29,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:53:28" (2/3) ... [2021-12-14 14:53:29,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@686a7182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:53:29, skipping insertion in model container [2021-12-14 14:53:29,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:53:29" (3/3) ... [2021-12-14 14:53:29,522 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.11.cil-1.c [2021-12-14 14:53:29,526 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 14:53:29,526 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 14:53:29,565 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 14:53:29,570 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 14:53:29,570 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 14:53:29,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 365 states, 329 states have (on average 1.6656534954407294) internal successors, (548), 333 states have internal predecessors, (548), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-14 14:53:29,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 14:53:29,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:29,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:29,598 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:29,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:29,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1184311821, now seen corresponding path program 1 times [2021-12-14 14:53:29,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:29,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375689519] [2021-12-14 14:53:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:29,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:29,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:29,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:53:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:29,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 14:53:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:29,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-14 14:53:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:29,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-14 14:53:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:30,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:30,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:30,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375689519] [2021-12-14 14:53:30,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375689519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:30,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:30,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:53:30,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245757093] [2021-12-14 14:53:30,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:30,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:53:30,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:30,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:53:30,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:53:30,034 INFO L87 Difference]: Start difference. First operand has 365 states, 329 states have (on average 1.6656534954407294) internal successors, (548), 333 states have internal predecessors, (548), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:31,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:31,204 INFO L93 Difference]: Finished difference Result 851 states and 1417 transitions. [2021-12-14 14:53:31,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 14:53:31,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-14 14:53:31,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:31,216 INFO L225 Difference]: With dead ends: 851 [2021-12-14 14:53:31,217 INFO L226 Difference]: Without dead ends: 490 [2021-12-14 14:53:31,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:53:31,223 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 971 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:31,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [994 Valid, 1034 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 14:53:31,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-12-14 14:53:31,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 359. [2021-12-14 14:53:31,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 325 states have (on average 1.5784615384615384) internal successors, (513), 327 states have internal predecessors, (513), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-14 14:53:31,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 565 transitions. [2021-12-14 14:53:31,284 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 565 transitions. Word has length 167 [2021-12-14 14:53:31,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:31,284 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 565 transitions. [2021-12-14 14:53:31,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:31,285 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 565 transitions. [2021-12-14 14:53:31,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 14:53:31,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:31,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:31,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 14:53:31,289 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:31,290 INFO L85 PathProgramCache]: Analyzing trace with hash -915426609, now seen corresponding path program 1 times [2021-12-14 14:53:31,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:31,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939473076] [2021-12-14 14:53:31,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:31,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:31,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:31,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:53:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:31,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 14:53:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:31,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-14 14:53:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:31,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-14 14:53:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:31,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:31,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939473076] [2021-12-14 14:53:31,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939473076] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:31,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:31,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:53:31,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514837240] [2021-12-14 14:53:31,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:31,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:53:31,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:31,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:53:31,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:53:31,470 INFO L87 Difference]: Start difference. First operand 359 states and 565 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:32,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:32,451 INFO L93 Difference]: Finished difference Result 833 states and 1329 transitions. [2021-12-14 14:53:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 14:53:32,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-14 14:53:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:32,455 INFO L225 Difference]: With dead ends: 833 [2021-12-14 14:53:32,455 INFO L226 Difference]: Without dead ends: 490 [2021-12-14 14:53:32,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:53:32,457 INFO L933 BasicCegarLoop]: 621 mSDtfsCounter, 958 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:32,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [981 Valid, 1020 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 14:53:32,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-12-14 14:53:32,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 359. [2021-12-14 14:53:32,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 325 states have (on average 1.5753846153846154) internal successors, (512), 327 states have internal predecessors, (512), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-14 14:53:32,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 564 transitions. [2021-12-14 14:53:32,481 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 564 transitions. Word has length 167 [2021-12-14 14:53:32,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:32,482 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 564 transitions. [2021-12-14 14:53:32,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:32,482 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 564 transitions. [2021-12-14 14:53:32,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 14:53:32,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:32,484 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:32,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 14:53:32,485 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:32,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:32,485 INFO L85 PathProgramCache]: Analyzing trace with hash 7740817, now seen corresponding path program 1 times [2021-12-14 14:53:32,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:32,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788406145] [2021-12-14 14:53:32,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:32,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:32,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:32,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:53:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:32,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 14:53:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:32,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-14 14:53:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:32,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-14 14:53:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:32,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:32,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788406145] [2021-12-14 14:53:32,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788406145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:32,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:32,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:53:32,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379895875] [2021-12-14 14:53:32,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:32,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:53:32,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:32,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:53:32,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:53:32,638 INFO L87 Difference]: Start difference. First operand 359 states and 564 transitions. Second operand has 6 states, 6 states have (on average 26.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:34,683 INFO L93 Difference]: Finished difference Result 1317 states and 2115 transitions. [2021-12-14 14:53:34,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 14:53:34,685 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-14 14:53:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:34,689 INFO L225 Difference]: With dead ends: 1317 [2021-12-14 14:53:34,689 INFO L226 Difference]: Without dead ends: 977 [2021-12-14 14:53:34,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 14:53:34,691 INFO L933 BasicCegarLoop]: 669 mSDtfsCounter, 1453 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 1813 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:34,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 1645 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1813 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-14 14:53:34,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-12-14 14:53:34,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 714. [2021-12-14 14:53:34,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 653 states have (on average 1.5880551301684533) internal successors, (1037), 656 states have internal predecessors, (1037), 47 states have call successors, (47), 13 states have call predecessors, (47), 13 states have return successors, (48), 45 states have call predecessors, (48), 45 states have call successors, (48) [2021-12-14 14:53:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1132 transitions. [2021-12-14 14:53:34,732 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1132 transitions. Word has length 167 [2021-12-14 14:53:34,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:34,732 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 1132 transitions. [2021-12-14 14:53:34,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:34,733 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1132 transitions. [2021-12-14 14:53:34,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 14:53:34,735 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:34,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:34,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 14:53:34,735 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:34,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:34,736 INFO L85 PathProgramCache]: Analyzing trace with hash 930141325, now seen corresponding path program 1 times [2021-12-14 14:53:34,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:34,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584815106] [2021-12-14 14:53:34,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:34,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:34,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:34,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:53:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:34,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 14:53:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:34,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-14 14:53:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:34,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-14 14:53:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:34,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:34,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584815106] [2021-12-14 14:53:34,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584815106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:34,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:34,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:34,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352949639] [2021-12-14 14:53:34,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:34,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:34,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:34,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:34,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:34,861 INFO L87 Difference]: Start difference. First operand 714 states and 1132 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:37,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:37,486 INFO L93 Difference]: Finished difference Result 2175 states and 3500 transitions. [2021-12-14 14:53:37,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:37,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-14 14:53:37,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:37,494 INFO L225 Difference]: With dead ends: 2175 [2021-12-14 14:53:37,495 INFO L226 Difference]: Without dead ends: 1480 [2021-12-14 14:53:37,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:37,507 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 1476 mSDsluCounter, 1888 mSDsCounter, 0 mSdLazyCounter, 2853 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 2848 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:37,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1494 Valid, 2848 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2853 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-14 14:53:37,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-12-14 14:53:37,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1044. [2021-12-14 14:53:37,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 956 states have (on average 1.5815899581589958) internal successors, (1512), 960 states have internal predecessors, (1512), 67 states have call successors, (67), 19 states have call predecessors, (67), 20 states have return successors, (70), 66 states have call predecessors, (70), 65 states have call successors, (70) [2021-12-14 14:53:37,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1649 transitions. [2021-12-14 14:53:37,568 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1649 transitions. Word has length 167 [2021-12-14 14:53:37,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:37,568 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 1649 transitions. [2021-12-14 14:53:37,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:37,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1649 transitions. [2021-12-14 14:53:37,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 14:53:37,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:37,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:37,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 14:53:37,576 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:37,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:37,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1467846513, now seen corresponding path program 1 times [2021-12-14 14:53:37,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:37,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834585896] [2021-12-14 14:53:37,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:37,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:37,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:37,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:53:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:37,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 14:53:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:37,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-14 14:53:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:37,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-14 14:53:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:37,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:37,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834585896] [2021-12-14 14:53:37,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834585896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:37,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:37,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:37,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835338772] [2021-12-14 14:53:37,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:37,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:37,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:37,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:37,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:37,709 INFO L87 Difference]: Start difference. First operand 1044 states and 1649 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:40,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:40,255 INFO L93 Difference]: Finished difference Result 3440 states and 5525 transitions. [2021-12-14 14:53:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:40,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-14 14:53:40,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:40,265 INFO L225 Difference]: With dead ends: 3440 [2021-12-14 14:53:40,265 INFO L226 Difference]: Without dead ends: 2415 [2021-12-14 14:53:40,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:40,269 INFO L933 BasicCegarLoop]: 952 mSDtfsCounter, 1473 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 2859 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 2836 SdHoareTripleChecker+Invalid, 2939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:40,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1491 Valid, 2836 Invalid, 2939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2859 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-14 14:53:40,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-12-14 14:53:40,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1705. [2021-12-14 14:53:40,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1563 states have (on average 1.5758157389635317) internal successors, (2463), 1569 states have internal predecessors, (2463), 107 states have call successors, (107), 31 states have call predecessors, (107), 34 states have return successors, (118), 108 states have call predecessors, (118), 105 states have call successors, (118) [2021-12-14 14:53:40,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 2688 transitions. [2021-12-14 14:53:40,367 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 2688 transitions. Word has length 167 [2021-12-14 14:53:40,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:40,368 INFO L470 AbstractCegarLoop]: Abstraction has 1705 states and 2688 transitions. [2021-12-14 14:53:40,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:40,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 2688 transitions. [2021-12-14 14:53:40,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 14:53:40,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:40,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:40,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 14:53:40,371 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:40,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:40,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1129558963, now seen corresponding path program 1 times [2021-12-14 14:53:40,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:40,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791915359] [2021-12-14 14:53:40,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:40,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:40,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:40,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:53:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:40,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 14:53:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:40,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-14 14:53:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:40,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-14 14:53:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:40,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:40,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791915359] [2021-12-14 14:53:40,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791915359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:40,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:40,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:40,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650619028] [2021-12-14 14:53:40,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:40,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:40,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:40,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:40,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:40,489 INFO L87 Difference]: Start difference. First operand 1705 states and 2688 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:43,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:43,045 INFO L93 Difference]: Finished difference Result 5873 states and 9396 transitions. [2021-12-14 14:53:43,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:43,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-14 14:53:43,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:43,061 INFO L225 Difference]: With dead ends: 5873 [2021-12-14 14:53:43,061 INFO L226 Difference]: Without dead ends: 4187 [2021-12-14 14:53:43,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:43,067 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 1469 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 2854 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 2832 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:43,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1487 Valid, 2832 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2854 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-14 14:53:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4187 states. [2021-12-14 14:53:43,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4187 to 3028. [2021-12-14 14:53:43,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 2778 states have (on average 1.5712742980561556) internal successors, (4365), 2788 states have internal predecessors, (4365), 187 states have call successors, (187), 55 states have call predecessors, (187), 62 states have return successors, (220), 192 states have call predecessors, (220), 185 states have call successors, (220) [2021-12-14 14:53:43,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 4772 transitions. [2021-12-14 14:53:43,218 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 4772 transitions. Word has length 167 [2021-12-14 14:53:43,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:43,218 INFO L470 AbstractCegarLoop]: Abstraction has 3028 states and 4772 transitions. [2021-12-14 14:53:43,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:43,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 4772 transitions. [2021-12-14 14:53:43,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 14:53:43,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:43,222 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:43,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 14:53:43,222 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:43,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:43,222 INFO L85 PathProgramCache]: Analyzing trace with hash -703004465, now seen corresponding path program 1 times [2021-12-14 14:53:43,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:43,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128855393] [2021-12-14 14:53:43,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:43,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:43,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:43,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:53:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:43,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 14:53:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:43,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-14 14:53:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:43,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-14 14:53:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:43,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:43,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128855393] [2021-12-14 14:53:43,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128855393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:43,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:43,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:43,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793643915] [2021-12-14 14:53:43,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:43,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:43,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:43,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:43,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:43,349 INFO L87 Difference]: Start difference. First operand 3028 states and 4772 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:45,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:45,946 INFO L93 Difference]: Finished difference Result 10738 states and 17154 transitions. [2021-12-14 14:53:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:45,947 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-14 14:53:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:45,996 INFO L225 Difference]: With dead ends: 10738 [2021-12-14 14:53:45,996 INFO L226 Difference]: Without dead ends: 7729 [2021-12-14 14:53:46,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:46,004 INFO L933 BasicCegarLoop]: 944 mSDtfsCounter, 1465 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 2849 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1483 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 2929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:46,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1483 Valid, 2828 Invalid, 2929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2849 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 14:53:46,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7729 states. [2021-12-14 14:53:46,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7729 to 5679. [2021-12-14 14:53:46,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5679 states, 5213 states have (on average 1.5681948973719548) internal successors, (8175), 5231 states have internal predecessors, (8175), 347 states have call successors, (347), 103 states have call predecessors, (347), 118 states have return successors, (442), 360 states have call predecessors, (442), 345 states have call successors, (442) [2021-12-14 14:53:46,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5679 states to 5679 states and 8964 transitions. [2021-12-14 14:53:46,268 INFO L78 Accepts]: Start accepts. Automaton has 5679 states and 8964 transitions. Word has length 167 [2021-12-14 14:53:46,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:46,268 INFO L470 AbstractCegarLoop]: Abstraction has 5679 states and 8964 transitions. [2021-12-14 14:53:46,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:46,269 INFO L276 IsEmpty]: Start isEmpty. Operand 5679 states and 8964 transitions. [2021-12-14 14:53:46,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 14:53:46,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:46,272 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:46,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 14:53:46,273 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:46,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1243433971, now seen corresponding path program 1 times [2021-12-14 14:53:46,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:46,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400097179] [2021-12-14 14:53:46,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:46,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:46,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:46,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:53:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:46,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 14:53:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:46,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-14 14:53:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:46,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-14 14:53:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:46,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:46,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400097179] [2021-12-14 14:53:46,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400097179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:46,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:46,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:46,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847286071] [2021-12-14 14:53:46,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:46,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:46,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:46,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:46,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:46,396 INFO L87 Difference]: Start difference. First operand 5679 states and 8964 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:49,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:49,327 INFO L93 Difference]: Finished difference Result 20467 states and 32728 transitions. [2021-12-14 14:53:49,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:49,328 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-14 14:53:49,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:49,380 INFO L225 Difference]: With dead ends: 20467 [2021-12-14 14:53:49,380 INFO L226 Difference]: Without dead ends: 14807 [2021-12-14 14:53:49,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:49,399 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 1464 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 2841 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1482 SdHoareTripleChecker+Valid, 2822 SdHoareTripleChecker+Invalid, 2924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:49,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1482 Valid, 2822 Invalid, 2924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2841 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 14:53:49,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14807 states. [2021-12-14 14:53:49,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14807 to 10994. [2021-12-14 14:53:49,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10994 states, 10096 states have (on average 1.5662638668779714) internal successors, (15813), 10130 states have internal predecessors, (15813), 667 states have call successors, (667), 199 states have call predecessors, (667), 230 states have return successors, (940), 696 states have call predecessors, (940), 665 states have call successors, (940) [2021-12-14 14:53:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10994 states to 10994 states and 17420 transitions. [2021-12-14 14:53:49,978 INFO L78 Accepts]: Start accepts. Automaton has 10994 states and 17420 transitions. Word has length 167 [2021-12-14 14:53:49,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:49,979 INFO L470 AbstractCegarLoop]: Abstraction has 10994 states and 17420 transitions. [2021-12-14 14:53:49,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:49,979 INFO L276 IsEmpty]: Start isEmpty. Operand 10994 states and 17420 transitions. [2021-12-14 14:53:49,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 14:53:49,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:49,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:49,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 14:53:49,986 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:49,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:49,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1399414513, now seen corresponding path program 1 times [2021-12-14 14:53:49,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:49,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420700070] [2021-12-14 14:53:49,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:49,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:50,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:50,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:53:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:50,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 14:53:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:50,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-14 14:53:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:50,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-14 14:53:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:50,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:50,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420700070] [2021-12-14 14:53:50,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420700070] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:50,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:50,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:50,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299081472] [2021-12-14 14:53:50,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:50,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:50,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:50,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:50,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:50,089 INFO L87 Difference]: Start difference. First operand 10994 states and 17420 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:53,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:53,721 INFO L93 Difference]: Finished difference Result 39893 states and 64006 transitions. [2021-12-14 14:53:53,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:53:53,721 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-14 14:53:53,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:53,810 INFO L225 Difference]: With dead ends: 39893 [2021-12-14 14:53:53,811 INFO L226 Difference]: Without dead ends: 28918 [2021-12-14 14:53:53,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:53:53,848 INFO L933 BasicCegarLoop]: 930 mSDtfsCounter, 1459 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 2821 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 2814 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:53,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1477 Valid, 2814 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2821 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-14 14:53:53,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28918 states. [2021-12-14 14:53:54,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28918 to 21686. [2021-12-14 14:53:54,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21686 states, 19924 states have (on average 1.5658000401525798) internal successors, (31197), 19990 states have internal predecessors, (31197), 1307 states have call successors, (1307), 391 states have call predecessors, (1307), 454 states have return successors, (2098), 1368 states have call predecessors, (2098), 1305 states have call successors, (2098) [2021-12-14 14:53:54,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21686 states to 21686 states and 34602 transitions. [2021-12-14 14:53:54,972 INFO L78 Accepts]: Start accepts. Automaton has 21686 states and 34602 transitions. Word has length 167 [2021-12-14 14:53:54,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:54,973 INFO L470 AbstractCegarLoop]: Abstraction has 21686 states and 34602 transitions. [2021-12-14 14:53:54,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:54,973 INFO L276 IsEmpty]: Start isEmpty. Operand 21686 states and 34602 transitions. [2021-12-14 14:53:54,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 14:53:54,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:54,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:53:54,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 14:53:54,985 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:54,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:54,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1107682961, now seen corresponding path program 1 times [2021-12-14 14:53:54,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:54,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63766283] [2021-12-14 14:53:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:54,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:55,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:55,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:53:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:55,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 14:53:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:55,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-14 14:53:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:55,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-14 14:53:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:55,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:55,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63766283] [2021-12-14 14:53:55,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63766283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:55,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:55,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:55,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290613496] [2021-12-14 14:53:55,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:55,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:55,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:55,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:55,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:55,130 INFO L87 Difference]: Start difference. First operand 21686 states and 34602 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:54:00,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:54:00,176 INFO L93 Difference]: Finished difference Result 78811 states and 127290 transitions. [2021-12-14 14:54:00,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:54:00,177 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-14 14:54:00,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:54:00,416 INFO L225 Difference]: With dead ends: 78811 [2021-12-14 14:54:00,417 INFO L226 Difference]: Without dead ends: 57144 [2021-12-14 14:54:00,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:54:00,486 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 1458 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 2813 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 2809 SdHoareTripleChecker+Invalid, 2897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:54:00,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1476 Valid, 2809 Invalid, 2897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2813 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-14 14:54:00,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57144 states. [2021-12-14 14:54:02,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57144 to 43131. [2021-12-14 14:54:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43131 states, 39641 states have (on average 1.565424686561893) internal successors, (62055), 39771 states have internal predecessors, (62055), 2587 states have call successors, (2587), 775 states have call predecessors, (2587), 902 states have return successors, (4900), 2712 states have call predecessors, (4900), 2585 states have call successors, (4900) [2021-12-14 14:54:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43131 states to 43131 states and 69542 transitions. [2021-12-14 14:54:02,861 INFO L78 Accepts]: Start accepts. Automaton has 43131 states and 69542 transitions. Word has length 167 [2021-12-14 14:54:02,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:54:02,861 INFO L470 AbstractCegarLoop]: Abstraction has 43131 states and 69542 transitions. [2021-12-14 14:54:02,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:54:02,862 INFO L276 IsEmpty]: Start isEmpty. Operand 43131 states and 69542 transitions. [2021-12-14 14:54:02,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 14:54:02,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:54:02,881 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:54:02,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 14:54:02,882 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:54:02,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:54:02,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1028200241, now seen corresponding path program 1 times [2021-12-14 14:54:02,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:54:02,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476474638] [2021-12-14 14:54:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:54:02,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:54:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:54:02,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:54:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:54:02,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:54:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:54:02,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 14:54:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:54:02,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-14 14:54:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:54:02,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-14 14:54:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:54:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:54:02,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:54:02,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476474638] [2021-12-14 14:54:02,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476474638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:54:02,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:54:02,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:54:02,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655036442] [2021-12-14 14:54:02,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:54:02,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:54:02,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:54:02,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:54:02,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:54:02,994 INFO L87 Difference]: Start difference. First operand 43131 states and 69542 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:54:11,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:54:11,145 INFO L93 Difference]: Finished difference Result 156646 states and 255704 transitions. [2021-12-14 14:54:11,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:54:11,145 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-14 14:54:11,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:54:11,522 INFO L225 Difference]: With dead ends: 156646 [2021-12-14 14:54:11,522 INFO L226 Difference]: Without dead ends: 113534 [2021-12-14 14:54:11,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:54:11,633 INFO L933 BasicCegarLoop]: 920 mSDtfsCounter, 1457 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 2805 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1475 SdHoareTripleChecker+Valid, 2804 SdHoareTripleChecker+Invalid, 2889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:54:11,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1475 Valid, 2804 Invalid, 2889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2805 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-14 14:54:11,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113534 states. [2021-12-14 14:54:15,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113534 to 86148. [2021-12-14 14:54:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86148 states, 79202 states have (on average 1.5651246180652003) internal successors, (123961), 79460 states have internal predecessors, (123961), 5147 states have call successors, (5147), 1543 states have call predecessors, (5147), 1798 states have return successors, (11962), 5400 states have call predecessors, (11962), 5145 states have call successors, (11962) [2021-12-14 14:54:16,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86148 states to 86148 states and 141070 transitions. [2021-12-14 14:54:16,242 INFO L78 Accepts]: Start accepts. Automaton has 86148 states and 141070 transitions. Word has length 167 [2021-12-14 14:54:16,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:54:16,242 INFO L470 AbstractCegarLoop]: Abstraction has 86148 states and 141070 transitions. [2021-12-14 14:54:16,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:54:16,243 INFO L276 IsEmpty]: Start isEmpty. Operand 86148 states and 141070 transitions. [2021-12-14 14:54:16,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-14 14:54:16,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:54:16,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:54:16,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 14:54:16,282 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:54:16,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:54:16,283 INFO L85 PathProgramCache]: Analyzing trace with hash -958552367, now seen corresponding path program 1 times [2021-12-14 14:54:16,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:54:16,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177054916] [2021-12-14 14:54:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:54:16,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:54:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:54:16,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:54:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:54:16,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 14:54:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:54:16,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 14:54:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:54:16,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-14 14:54:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:54:16,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-14 14:54:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:54:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:54:16,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:54:16,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177054916] [2021-12-14 14:54:16,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177054916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:54:16,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:54:16,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:54:16,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715688235] [2021-12-14 14:54:16,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:54:16,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:54:16,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:54:16,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:54:16,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:54:16,401 INFO L87 Difference]: Start difference. First operand 86148 states and 141070 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 5 states have internal predecessors, (156), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)